Commit efa2049f authored Mar 18, 2014 by Ujwal Patel

msm: mdss: fix wb_ctl_alloc to allow use of rotator2

Currently MDSS HW can support maximum of 5 active ctl paths, so the size
of the container array holding all ctl paths is also 5. Now current code
has a limitation where it doesn't allow rotator2 to be used if number of
DSPP based interfaces are 4, which is the case for apq8084. This can lead
to sub-par performance when more than 1 rotator sessions are needed
simultaneously. Fix this by allowing last 2 spots of the ctl path
container array for rotator.

Change-Id: I40e968141d92ce6272072d9b5b8c59402d8a543c
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>

parent 47d53bf2

drivers/video/msm/mdss/mdss_mdp_ctl.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1177,8 +1177,9 @@ struct mdss_mdp_mixer *mdss_mdp_wb_mixer_alloc(int rotator)
		{
		struct mdss_mdp_ctl *ctl = NULL;
		struct mdss_mdp_mixer *mixer = NULL;
		u32 offset = mdss_res->nctl - mdss_res->nmixers_wb;

		ctl = mdss_mdp_ctl_alloc(mdss_res, mdss_res->nmixers_intf);
		ctl = mdss_mdp_ctl_alloc(mdss_res, offset);
		if (!ctl) {
		pr_debug("unable to allocate wb ctl\n");
		return NULL;